Hi MOzT, Thank you for sharing your feedback. Your satisfaction is our topmost priority and we are glad that you are using Samsung products. We apologize for the inconvenience of the refrigerator not cooling properly and having a hissing sound. We will surely notate this feedback for better products and options in the future. For future reference, I highly recommend visiting these links for basic troubleshooting steps: https://www.samsung.com/us/support/search/?query=refigerator&referrerPageUrl=https://www.samsung.com/us/support/ Understand the noises coming from your refrigerator: https://www.samsung.com/us/support/troubleshooting/TSG01001032/ Cooling issues with the refrigerator or freezer: https://www.samsung.com/us/support/troubleshooting/TSG01001027/ Tips for an organized refrigerator: https://www.samsung.com/us/support/answer/ANS00084845/ You may check this link for future reference to reduce unnecessary repairs over the refrigerator's lifetime. https://www.samsung.com/us/support/answer/ANS00079481/ If repair is needed, please take note of your warranty coverage: https://www.samsung.com/us/support/service/warranty/RS28A500ASR/AA If assistance is needed, please reach us with the following options to further assist you: 1. Facebook Messenger: http://m.me/samsungsupport 2. Twitter: https://twitter.com/messages/compose?recipient_id=18768513 3. Samsung Community: https://us.community.samsung.com/t5/Samsung-Community/ct-p/us Reference Ticket number: 1144569345 Thank you for choosing Samsung. Have a great day. -Trisha-